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The quality control manager at a computer manufacturing company believes that the mean life of a...

The quality control manager at a computer manufacturing company believes that the mean life of a computer is 99 months, with a standard deviation of 8 months.

If he is correct, what is the probability that the mean of a sample of 69 computers would be greater than 97.94months? Round your answer to four decimal places.

Math   Statistics-And-Probability   
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